A couple of things

DOAMRSCOUSE

NPCs aren't appearing for me to complete some quests, also my powers (which I can assign to my X, B, O, Y plus numbers and triggers are not responding neither. Help?

netch_a_sketch

The NPC bug on consoles is a known problem to the ZOS developers, hopefully they'll patch it up during maintenance or relatively soon. As for the powers, it's possible that it could be an issue with your Xbox controller. One other thing I've found is that mine don't work if I'm not directly aiming at the NPC. On PC versions it seems to me that the targeting area is wider. If all else fails, either restart your Xbox, reset the controller or wait for a patch.
Hope it gets fixed for you soon!

DOAMRSCOUSE

Bumpers sorry, not numbers. Autocorrect got me

DOAMRSCOUSE

Thanks buddy. I'll try again tonight

EposSilver

The NPC thing actually got worse after the maintenance...